Trolley-pole.



` UNITED STATES jPATFNT- OFFICE.

rammed May 2 4, 1904. i

iFOURTH TO LEWIS lM. WOOD, OF ILONGBEA'CH, CALIFORNIA.v

TROLLEY-POLE.

'SPECIFICATION forming part of Letters'Patent No. 760,641, dated May24,V 1904..

Application ltiled November 16,1903. Seriallm 181,386.l No model.) d lTo @ZZ whom it may .concer-71,: v

Be it known that I, ALFRED W. MORGAN, a citizen of the United States,residing at Longbeach, in the county of Los Angeles and State ofCalifornia, have invented a new and useful Trolley-Pole, of which thefollowing is' a f specification.`

contact between the trolley and the conductorwire.

A further object of the invention is to permit the elevator-pole to dropbelow the conductor under certain conditions, so as to prevent contactofthe pole orhar'p with any of the guy-wires or any other obstruction.

A further object of the invention is to yieldingly support the pole, theyieldability of which can bedestroyed mechanically.

Another object of the invention is to pro-Y vide means for permittingthe pole to automatically drop below the conductor-wire and at the sametime support said pole above the car. f

Further objects and advantages of this-invention will-appear in thefollowing description, and the novel features thereof will beparticularly pointed out in the appended claims, it being understoodthat changes in the form, proportion, and theminor details ofconstruction may be -resorted to Without departing from the spirit orsacrificing any of the advantages of the invention. e

Figure 1 is a view, partly in elevation and partly in plan, of thedevice applied. Fig. 2 is a similar view after the leversV have beentripped. Fig. 3 is' a vertical cross-sectional view through the base andcar-top,ltaken on line 3 3 of Fig. 1. Fig. 4 is a fragmentary top planview of one of the levers, showing Y rollers carried thereby. l Fig. 5is an end view of the lever illustrated in Fig. 4. Fig. 6 is a verticalsectional view of' the sliding sleeve and the lever for thetrolley-supporting harp.

' ductor.

Fig. 7 is a view in side elevation of a modi- `iiedform of trolley-harpand a portion of the` pole. Fig. ..8 is a similar view ofa furthermodified form of harp, and Fig. 9 is a like View of an additional formof trolley-harp. Fig. 10 is a detail rear elevation with thetrolley-pole in section, illustrating the disposition of the upperportion of the trigger to lie out of the path of the downward movementof the .ing parallel ears 7 through which projects a yshaft 8, carriedby the pole and on which the harp can rock. Theusual trolley9 is mountedin the harp at a point above the pivot thereof and is supported abovethe 'pole by a lever 10, movable on the reduced end 3 of the pole by acollar 10, between which and the shoulder 3b is --a spring 11, having atendency tol force the lever 10 outward, so as 5to maintain the trolleyin constant contact with the con- Suitable mechanism is also providedfornormally. holding the harp-carrying end of the pole in elevation,`and this mechanism vis illustrated as comprisingaplurality ofspring-controlled levers, one of Ywhich is designated as 12 andfulcrumed at 13. One end of the lever 12 isconnected. to the pole by acoil-spring 14, while the otherv end is connectedy to asecond lever 15,horizontally-disposed and carrying a link-lever 16 which is connected tothe lever Y12 and oiiers apull to the end of the leve 12 remote from theend connectedv to the spring, so as to normally hold the spring' 14under tension. The position of the lever 12 will be governed by theposition ofthe lever'15, which is provided with a bifurcated terminall,in which is aroller 17, normally engaged bya spring-trigger having ashoulder 18 resting over the top of the roller, so that the link-lever16 will have a tendency to pull one end of the lever 12 against pull ofthe spring 14 and so as to throw one end of the lever 12 away fromthepole and cause the spring 14 to be under tension.

The trig'ger is connected to the arm of the trolley-harp b y aconnection 19, so that in the event of the trolley jumping the conductorthe arm 10 of the harp would be moved beyond its normal position to suchan extent that the yielding end of the trigger will be unseated, causingthe lever 15 to move upward and permit one end of the lever 12 to movetoward the pole, so as to destroy the tension of the spring 14 andpermitting the harp-carrying end ot' the pole to drop below theconductor-Wire and below the guy-wires, thereby preventing any accidentdue to contact of the trolley and other obstructions. It vwill beobserved that the pole is yieldably but independently mounted and whenin its normal position the tendency will be to keep the trolley inconstant contact with the conconductor, so as to obviate the loss ofcurrent due to continuous vibration of the trolley, which is ofconsiderable annoyance and expense in roads employing the present styleof trolley.

r1`he antifriction-roller 17 is carried by the bifurcated end of thelever 15, so as to reduce friction during the engagement anddisengagement oi' the trigger with the lever 15, and in order to permitthe lever 15 to easily ride upon the lower edge of the pole 3 the irminal arms 20 are arranged to lie on either side of the lever 15, thusfacilitating the restoration of the several parts of the mechanism totheir normal position.

inasmuch as the trolley-harp will have a considerable latitude ofmovement on the pole,

the trolley will not jump owing to the usual vibration or swaying of thecar, as do the ordinary constructions of trolleys, and the levermechanism carried by the base 2 will not be actuated except under a veryunusual circumstance. However, when the pole is vibrated beyond thelimit of movement oi the arm of the harp the trigger 18 will hePutomatically drawn out of engagement witln the lever 15, permitting thepole to fall, above described. The spring 14 will expa` Suthciently topermit the pole to dro Vi the necessary distance below the wir i andwill contact with the antifrictiondeviccs on t .e end ot the lever 15,but will not bear thereon to any considerable extent.

To reset the trigger, the pole 3 is drawn down by means of the cord 31and presses on the lever 15, forcing it down into engagement with theshoulder or lip 18 of the trigger, and the tension of the spring willthen cause the pole to move upward into operative position.

It will here be explained that the upper end portion yo1 the triggerabove the shoulder 18 is bent or offset laterally to one side ot' thevertical path of the trolley-pole 3, so that when the latter is beingdrawn down to reset the trigger it will pass at one side of the upperportion of the trigger, and the roller 17 will engage with the shoulder18 before the trolley-pole reaches the same, wherefore it will beunderstood that the top et' the springtrigger is disposed so as not tointerfere with the resetting of the apparatus.

The form of harp illustrated in Fig. 7 comprises an arm 21, carried bythe pole, with the trolley mounted in the free end thereof, the oppositeend terminating in a depending arm 22, connected to the cord 19, andbetween the arm 22 and the pole a coil-spring 23 is interposed tonormally hold the trolley in contact with the wire.

In Fig. 8 the form illustrated comprises a terminally-pivoted harp 24,carrying the usual trolley at the end opposite the pivoted terminal andintcrmediately connected to the cord 19, a spring 25 being interposed topreserve the normal contact of the trolley and the conductor-wire.

ln Fig. 9 the form of harp is similar to that shown in Fig. 8, but inlieu of the spring 25 a pair of spring-pressed toggles 2G and 27 areemployed, which are secured, respectively, to the pole and the harp andconnected by a collar 28, slidable o1 a linger 29, pivotal] y carried bythe pole and around which is wound a coil-spring 30, exerting pressureagainst the collar 28. The cord 31 is designed for the purpose ofpulling down upon the harp to restore the several parts to their normalpositions.

It will be noted that by the lever 10, combined with the spring 11, auniform pressure will be exerted upon the conductor-wire, because as thetension of the spring decreases, due to expansion, the leverage ofthclever 10 will proportionally increase, so that the liability otl thetrolley jumping the wire will be remote.

Having thus described my invention, what I claim is- 1. The combinationwith a pivoted pole, of a lever mechanism for holding the pole suspendedand comprising two levers, one ol which is connected to the pole and theother lever having link connections attached to the first-named lever.

2. The combination with a pivoted pole, ot a lever, means connected withsaid lever to hold the pole in an elevated position, a trigger connectedwith said lever and aeonnector device on the pole for automaticallyreleasing the trigger.

3. The combination with a trolley-pole, of an intermediately-pivotedlever, one end of which is connected to the pole, a secondlever, meanson the second lever to engage the first lever and means engaging thesecond lever to hold the iirst-named lever in a position to support thepole.

4. The combination with a trolley-pole, of an intermediately-pivotedlever, one end ot which is connected to the pole, a second lever, ameans on the second lever to engage the lrstlOO IIO

named lever, and'means connected With the free end of the pole forautomatically releasing the levers to permit the pole to drop.V

5. The combination with apivoted trolleypole of a plurality of connectedlevers, one of which is connected to the poleby a spring and one ofwhich normally maintains the tension ofthe spring, and means connectedWith the free end of the pole and with one of said levers for relievingthe tension of the spring.

6. The combination With a pivoted trolleypole of a plurality ofconnected levers, one of which is connected to the pole by a spring andanother of which normally maintains the tension of the spring, andatrigger for destroying the tension ofthe spring.

7 The combination With a pivoted trolleypole, of a mechanism fornormally holding the pole elevated, a pivoted harp on the pole and vconnected to the" mechanism, and a springpressed lever connected to thepole and the l harp for exerting pressure against the harp to releasethe mechanism and permit the pole to drop.

8. The combination with a trolley-pole, a pivoted harp on the pole, alever movable longitudinally on the p ole and connected to the harp anda tension-spring exerting pressure Witnesses:

S. F. EAs'rERBRooKs, SIDNEY C. KENDALL.

